Ask Slashdot: How Do News Organizations Keep Track of So Much Information?

dryriver writes: Major news organizations from CNN, BBC, ABC to TIME magazine, the New York Times and the Economist publish a tremendous amount of information, especially now that almost everybody runs a 24/7 updated website alongside their TV channel, magazine or newspaper. Question: How do news organizations actually keep track of what must be 1000s of pieces of incoming information that are processed into news stories every day? If they are using software to manage all this info — which makes a lot of sense — is it off-the-shelf software that anybody can buy, or do major news organizations typically commission IT/software contractors to build them a custom “Information Management System” or similar? If there is good off-the-shelf software for managing a lot of information, who makes it and what is it called?